Sorry, but it didn’t work. I’m using a child theme.
I tried first adding the code directly to Appearance-> Editor with no change.
I deleted the code from there then added it into Appearance-> Customize -> Design Options -> Custom CSS still no change?
Oddly, the ways that I described adding it above (that did not work were in the child theme via the WordPress dashboard. I just added it to the child CSS via the cpanel and it worked. Buttons are the right size now.